US Bridges

Rock SPRINGS/7030 over Willow Creek

Good

Whitman County, Washington · 0.07 MI SW SR 26 · Structure no. 082934000000000

Built
1971
54 years old
Condition
Good
inspected November 2024
Type
Slab
Concrete Continuous
Length
108 ft
3 main spans
Daily traffic
63
2020 count
Owner
County
County Highway Agency

About this bridge

Rock SPRINGS/7030 over Willow Creek is a concrete continuous slab carrying Rock SPRINGS/7030 over Willow Creek in Whitman County, Washington. It was built in 1971, so it is 54 years old, older than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 63 vehicles a day, roughly 25% of them trucks, projected to reach 64 by 2039. The structure is 108 ft (32.9 m) long and 30 ft wide. If it were closed, the detour would be 41 mi (66 km).

CarriesRock SPRINGS/7030
CrossesWillow Creek
Location0.07 MI SW SR 26
RouteCounty Highway 70300
Coordinates46.76418, -118.0243
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating29.3 US tons
Inventory rating22.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length108 ft (32.9 m)
Longest span50 ft (15.2 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic63 (2020)
Projected traffic64 by 2039
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed41 mi (66 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$4.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Rock SPRINGS/7030 over Willow Creek built?

It was built in 1971, making it 54 years old in 2025.

What condition is Rock SPRINGS/7030 over Willow Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2024.

How much traffic does Rock SPRINGS/7030 over Willow Creek carry?

About 63 vehicles per day (2020 count), of which roughly 25% are trucks.

How long is Rock SPRINGS/7030 over Willow Creek?

The structure is 108 ft (32.9 m) long with a longest span of 50 ft (15.2 m) and a deck 30 ft wide.

Who owns Rock SPRINGS/7030 over Willow Creek?

It is owned by the County Highway Agency.